meta-xilinx/meta-xilinx-bsp/recipes-microblaze/gcc/gcc-7/0012-Fix-the-Microblaze-crash-with-msmall-divides-flag.patch

From 1a9dcdb578452ecd53e0aec65fe6279233218778 Mon Sep 17 00:00:00 2001
From: Mahesh Bodapati <mbodapat@xilinx.com>
Date: Sat, 26 Aug 2017 19:21:26 -0700
Subject: [PATCH] Fix the Microblaze crash with msmall-divides flag

Fix the Microblaze crash with msmall-divides flag Compiler is crashing
when we use msmall-divides and mxl-barrel-shift flag. This is because
when use above flags microblaze_expand_divide function will be called
for division operation. In microblaze_expand_divide function we are
using sub_reg but MicroBlaze doesn't have subreg register due to this
compiler was crashing. Changed the logic to avoid sub_reg call

Signed-off-by: Nagaraju Mekala <nagaraju.mekala@xilinx.com>
Signed-off-by: Mahesh Bodapati <mbodapat@xilinx.com>
Signed-off-by: Manjukumar Matha <manjukumar.harthikote-matha@xilinx.com>
Upstream-Status: Pending
---
 gcc/config/microblaze/microblaze.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/gcc/config/microblaze/microblaze.c b/gcc/config/microblaze/microblaze.c
index bba6983b65..15080db539 100644
--- a/gcc/config/microblaze/microblaze.c
+++ b/gcc/config/microblaze/microblaze.c
@@ -3527,8 +3527,7 @@ microblaze_expand_divide (rtx operands[])
   mem_rtx = gen_rtx_MEM (QImode,
                             gen_rtx_PLUS (Pmode, regt1, div_table_rtx));
 
-  insn = emit_insn (gen_movqi (regqi, mem_rtx)); 
-  insn = emit_insn (gen_movsi (operands[0], gen_rtx_SUBREG (SImode, regqi, 0)));
+  insn = emit_insn (gen_zero_extendqisi2(operands[0],mem_rtx));
   jump = emit_jump_insn_after (gen_jump (div_end_label), insn); 
   JUMP_LABEL (jump) = div_end_label;
   LABEL_NUSES (div_end_label) = 1; 
-- 
2.14.2